Say NO to all of them !!!
I don't think you need to go that far, really. Most, if not all of the people here, are past the age where DARE is required to graduate.
From what I know, I'd probably say cigarettes are the worst, then alcohol, then weed. I'm almost tempted to say alcohol is the worst though, partially because it causes WAY more problems than it solves. If you're not careful, you could end up getting roofie'd at a bar, and if you're not a responsible drinker, you could end up with a criminal record. Some drunk guy crashed a car into our house at 11:30 PM the night before Thanksgiving; that's probably not going to happen if someone's just smoking cigarettes.
Cigarettes irritate my throat and lungs, but as long as I don't have to be near them, I don't care too much. I understand it'd be different if I had asthma or a severe allergic reaction to cigarettes, but thankfully I don't.
Edited by PsychoSoldier, 04 February 2011 - 05:19 PM.